Release: DataFramesMeta v 0.13.0

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Hi all,

I am pleased to announce a new release of DataFramesMeta.jl, v 0.13.0

The release contains a bug-fix that has been plaguing users for a whole now, where .+ and .* would cause UndefVarErrors. This has been fixed.

The release also contains a new feature, @distinct, added by @Matthew . @distinct (and it’s row-wise counterpart @rdistinct) allow users to select distinct values from a data frame, just like disctinct in dplyr and duplicates drop in Stata.

julia> df = DataFrame(a = [1, 1, 2, 2, 3, 3, -1, -1], b = [2, 2, 3, 4, 4, 4, 4, 4])
8×2 DataFrame
 Row │ a      b     
     │ Int64  Int64 
─────┼──────────────
   1 │     1      2
   2 │     1      2
   3 │     2      3
   4 │     2      4
   5 │     3      4
   6 │     3      4
   7 │    -1      4
   8 │    -1      4

julia> @distinct df :a
4×2 DataFrame
 Row │ a      b     
     │ Int64  Int64 
─────┼──────────────
   1 │     1      2
   2 │     2      3
   3 │     3      4
   4 │    -1      4

julia> @rdistinct df :a^2
3×2 DataFrame
 Row │ a      b     
     │ Int64  Int64 
─────┼──────────────
   1 │     1      2
   2 │     2      3
   3 │     3      4

julia> @rdistinct df :a + :b
4×2 DataFrame
 Row │ a      b     
     │ Int64  Int64 
─────┼──────────────
   1 │     1      2
   2 │     2      3
   3 │     2      4
   4 │     3      4

Hopefully the pace of releases picks up soon.

4 Likes
2

may I ask what is breaking

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Nothing is breaking, but @distinct is a new feature, so we can’t implement a 0.0.x version bump. When we hit 1.0, we will be allowed to have non-breaking minor releases. But my understanding is that pre-1.0 all minor releases are technically breaking.

1 Like
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Major version zero (0.y.z) is for initial development. Anything MAY change at any time. The public API SHOULD NOT be considered stable.

my personal approach is to just keep increasing z until I have a breaking change, other wise people may need to change [compat] a lot. But either of us is right or wrong. In any case good to know no breaking changes!

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other wise people may need to change [compat] a lot.

Yes. I was concerned about that too, but my solution was to do releases less frequently. But it’s not a good solution! Cause then users don’t get bug-fixes and new features. So I think in the future we are going to power ahead until 1.0 (and make a roadmap…) with more frequent releases.

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